Diaphragm-setting for phonograph-reproducers.



-F. w. THOMAS', DIAHRGM :SETTING FOR -P-HON'OGRAEH BEPROD-UCEBS.-

. P3L-yemen mib luwzmma'u.

*--1;f134,'775.,- n 'Patented Apr. 6, 1915:

Z. i .Anomvfrs' character referred to so -as to be more satisfactory in operation, comparatively' simple and inexnensive'to produce and so designed as to be'uniformly effective for an indefinite time and irrespective of temperature and Weather conditions.

The invention has for its specific object "to providean improved diaphragm setting .Wherebv the. full tonal effects are, obtained from the vibrations of the `diaphragm and superior reproduction rendered possible. Athis through the use of novel, simple and reliable gaskets between which the peripheral edpe of the diaphragm is clamped: with a uniform and practically permanent compression, so that rattling ofthe diaphragm.

is positively prevented. n

TWith such objects in View, and others I lWhich will appear as-fthe description prolustrates an embodiment of theA invention,l

and wherein similar characters of reference j y Thus, the' diaphragm 1s made of minimum ceeds the invention comprises various novel features of construction and arrangement of parts Which will be set forth 'with particu lar-ity in the following description claims appended hereto.-

v y In the accompanying drawmg, which 1lindicate corresponding parts in' allthe views, Figure '1' `is .a front V1eW`of a sound repro,-

ducer with 'portions broken away'tp illus trate the details .of construct1on .;.F1g. 21sa sideview with portions in section; Fig: 3

` is a view of-a piece of the gasket stock; andv- Fig.v 4 is anenlarg'fed sectionalview through :soA the gaskets .and the ,peripheral portion, .of

' lReferring tothe drawing, l'desl'gnate's the body of the reproducer, recorder o1: 'equivalent device, and'in'this body. isa suitable lmetallicv or other diaphragm 2 to WhichLthe vstylus' bar 3 s t mnected 'in the usual mn- UNITED srarns Q 7,1u1'-iinnic .minoras or NEW CITY, NEW YORK.

y ySpecification of Letters Patent. Application filed July 2s, 1914. serials. 853,608.

' utilizedin sound reproduction.'

PATENT lOrmes.

' a .DTEAEEAGMQSETMKNG ron nHoNoGRAPH-nnrnonucnas.

Patented Apr. 6, 1915;

ner, and Within the-body 1 are annular gaskets l and 5 that engage opposite'sides of the diaphragm 2 and arel set respectively inapproX-imately semi-circular seats or annular groovesx and 7 clamping ring S; -f

The novel features of the m the body l and invention. reside in the manner of positioning the diaphragm with ,respect'to the annular gaskets l and 5 andthe' construction of the. gaskets' thema.

selves. The gaskets in the present instance are shown ras of circular cross-section and they'are in the form of rubber tubes filled with a fibrous core 9, which, together with the rubber of the tubular gaskets, forms an excellent setting for the diaphragm, as the tension or resiliency7 of the gaskets will be maintained indefinitely'and grip the diaphragm with a uniform pressure. ln other Words, after the gaskets have been subjected to the desired tension there will be no collapsing of the gaskets, as is now commonly the case WithA present reproducers .so that there is no danger of the diaphragm bccom- 'i ingv loose and rattling. AThe, gasket stock can be made in an v desired length, as rubber tubing is now made. but the tubing will be formed around the brous core of yarn or any othersuitablemateriah and this stock A size and the full effects ofthe vibration are From the'l foregoing .description'taken in I connection .with the accompanying drawing`s,=the advantages ofthe construction and i method of operation will be. readily 'understood by those skilledin the art to which the `invention appertains, andv while I have described theprinciple of operatiomtogether ,Withthe device which I now consider to be the best embodiment thereof, I desire to have it understood'that the device shown is merely llustrativefand that such changes may be' made when desired as fall within the scope of the appended claims.

Having thus described my in Patent:

l. The combination of a diaphragm and a gasket comprising a tube of yielding material, and a core in the tube for preventing collapsing thereof, ysaid core including afibrous material.

2. The combination "ofa sound box, adia1 phragm therein, and gaskets between which the diaphragm is clamped, each gasket comprising a tube of non-sonorous material, and

fibrous material within the tube and in direct `contact with the inner surface of the latter.- t

3. The combination of a'sound box, a dia- 3.. phragm therein, and gaskets between which ention, -v I I claim as new and desire to secure by Letters the diaphragm is clamped, said gasketsl each comprising a'tube of rubber and a filling of 20 fibrous material therein.

`4f. The combination of Ya sound box, a diai.-V i i phragm 'and a gasket comprising a' flexible strip adaptedto be curved into circular form L a .to vhave its ends meet, said strip consisting 25 of a rubberv tube, and a core preventmg collapsing thereof, the core embodying fibrous material.' y l .l j l 'l In testimony whereof I have slgnedmy name to this specification in the presence ofi 30` two subscribing witnesses.

FREDERIC w. THOMAS'. Witnesses: l, v

` CHATrgEN BRADWAY,

GEoRGnI-I. EMsLm. 

